Select...Where

SELECT * FORM SPFLI
  WHERE CARRID = ’LH’.
  ...
  ...
  ...
ENDSELECT.

Select...Check

SELECT * FORM SPFLI.
  CHECK SPFLI-CARRID = ’LH’.
  ...
  ...
  ...
ENDSELECT.

In above logic, Select...Where is better than Select...Check because the database can then user an index and system resource load is considerably less.

Select...Into Table

DATA: itab LIKE SPFLI OCCURS 0 WITH HEADER LINE.
SELECT * FORM SPFLI INTO TABLE itab.

Select...Append

DATA: itab LIKE SPFLI OCCURS 0 WITH HEADER LINE.
SELECT * FORM SPFLI INTO itab.
  APPEND itab.
ENDSELECT.

In above logic, Select...Into Table is faster than Select...Append.

When you create the form by SMARTFORMS, system will automatically create the function module for called by ABAP/4. You can get this function module by apply function module "SSF_FUNCTION_MODULE_NAME" and send the form name. This function will return the function name for call SMARTFORMS that you created.

Example

DATA: smf_name TYPE TDSFNAME VALUE ’ZSMARTFORM01’,
      fn_name TYPE RS38L_FNAM.
CALL FUNCTION ’SSF_FUNCTION_MODULE_NAME’
  EXPORTING
    FORMNAME = smf_name
  IMPORTING
    FM_NAME  = fn_name.  

When you want to popup message to confirm action, you can apply function module "POPUP_TO_CONFIRM_WITH_MESSAGE". The function will return:

• ’A’ - Yes
• Others - No or Cancel

Example

CALL FUNCTION ’POPUP_TO_CONFIRM_WITH_MESSAGE’
  EXPORTING
    DIAGNOSETTEXT1    =    ’Do you want save data?’
    TEXTLINE1         =    ’ ’
    TITEL             =    ’Confirm message!’
  IMPORTING
    ANSWER            =    lv_answer.  

• Blank Lines

Example

SELECTION-SCREEN SKIP 3.

• Underlines

Example

SELECTION-SCREEN ULINE.
SELECTION-SCREEN ULINE /1(20).

• Comments

Example

Loop...Where

LOOP AT itab where key = pa1.
  ...
  ...
  ...
ENDLOOP.

Loop...Check

LOOP AT itab.
  CHECK itab-key = pa1.
  ...
  ...
  ...
ENDLOOP.

In above logic, Loop...Where is better than Loop...Check because Loop...Where verifys the specified condition internally.